Question

In open pipes, the positions of antinodes are obtained at ___

• A. $0,\frac{\lambda }{2},2\lambda$
• B. $0,\frac{\lambda }{2},\lambda$
• C. $\frac{\lambda }{4},\frac{3\lambda }{4},\lambda$
• D. $\frac{5\lambda }{4},\frac{3\lambda }{4}$

Answer 1

Answer: (B)

In open pipes, position of antinodes is $\frac{n\lambda }{2}$
Putting vales of $n$ as $o,1,2$ we get position as $0,\lambda /2,\lambda$